Odd that the PHP would generate HTML files and put them in a cache directory!
If we're thinking of a re-architected site, I'm curious about what you see it looking like. My primary interest is in having a database in which to look up product information using some kind of API. That presupposes that the database is kept up-to-date. I'm wondering what else people might want.
The first thing I'd like to do, though, is figure out why the Android app (and possibly the iOS app) cannot retrieve data now that the site is back online. When I get a minute I'll check whether the code for those is in the repository.